That latch hardware is for earlier seats. I finally found my camera (wife had it) so I got some pictures for you of the two different latch styles on 72-76 A-body seats. The first one is mostly used for benches- both 50/50 and split bench w/ arm rest. The second style is used on buckets and also in benches but when used on benches they were atached to a cable so that they operate with a push button. The shape of the second may not not be 100% factory correct because I built it- I know the handle isn't correct. And finally the last picture is from an early set of buckets to show you how that kit your looking at works.